/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
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** modification, are permitted provided that the following conditions are
** met:
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**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
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**     of its contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
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****************************************************************************/

#include "tablemodel.h"
#include <QString>

TableModel::TableModel(GSData* pdata, QObject *parent)
    : QAbstractTableModel(parent)
{
    varData = pdata;
    int maxRows = 0;
    switch (varData->inDataType) {
    case GSData::VECTOR:
        rows = varData->vecData.length();
        cols = 1;
        break;
    case GSData::MATRIX:
        rows = varData->matData.rows();
        cols = varData->matData.cols();
        break;
    case GSData::ARRAY_VEC:
        rows = varData->arrayVecData.length();
        for(int i=0; i<pdata->arrayVecData.length();i++)
        {
            maxRows = pdata->arrayVecData(i).length();
            cols = (maxRows > cols) ? maxRows:cols;
        }
        break;
    case GSData::ARRAY_MAT:
        rows = varData->arrayMatData.length();
        for(int i=0; i<pdata->arrayMatData.length();i++)
        {
            maxRows = pdata->arrayMatData(i).size();
            cols = (maxRows > cols) ? maxRows:cols;
        }
        break;
    case GSData::STRING:
        rows = 1; cols = 1;
        break;
    }
}


int TableModel::rowCount(const QModelIndex &parent) const
{
    Q_UNUSED(parent);
    return rows;
}

int TableModel::columnCount(const QModelIndex &parent) const
{
    Q_UNUSED(parent);
    return cols;
}

QVariant TableModel::data(const QModelIndex &index, int role) const
{
    if (!index.isValid())
        return QVariant();

    if (index.row() >= rows || index.row() < 0)
        return QVariant();

    if (role == Qt::DisplayRole)
    {
        QString str;
        switch (varData->inDataType) {
        case GSData::VECTOR:
            str = QString::number(varData->vecData(index.row()));
        case GSData::MATRIX:
            str = QString::number(varData->matData(index.row(), index.column()));
            break;
        case GSData::ARRAY_VEC:
            str = QString::number(varData->arrayVecData(index.row())(index.column()));
            break;
        case GSData::ARRAY_MAT:
            str = QString::number(varData->arrayMatData(index.row())(index.column()));
            break;
        case GSData::STRING:
            str = varData->stringData;
            break;
        }
        return str;
    }
    return QVariant();
}

bool TableModel::setData(const QModelIndex &index, const QVariant &value, int role)
{
    if(value == "") return false;

    if(varData->inDataType != GSData::STRING)
    {
        foreach(QChar s, value.toString())
            if( !( s.isDigit() || (s == '.') || (s=='e')) ) return false;
    }

    if (index.isValid() && role == Qt::EditRole)
    {
        switch (varData->inDataType) {
        case GSData::VECTOR:
            varData->vecData(index.row()) = value.toDouble();
        case GSData::MATRIX:
            varData->matData(index.row(), index.column()) = value.toDouble();
            break;
        case GSData::ARRAY_VEC:
            varData->arrayVecData(index.row())(index.column()) = value.toDouble();
            break;
        case GSData::ARRAY_MAT:
            varData->arrayMatData(index.row())(index.column()) = value.toDouble();
            break;
        case GSData::STRING:
            varData->stringData = value.toString();
            break;
        }
        emit(dataChanged(index, index));

        return true;
    }

    return false;
}

Qt::ItemFlags TableModel::flags(const QModelIndex &index) const
{
    if (index.isValid())
        return  Qt::ItemIsSelectable | Qt::ItemIsEnabled | Qt::ItemIsEditable;
    else
        return  Qt::ItemIsSelectable;
}
